Automatic smoke-consuming device.



No. 800,034. PATENTED SEPT. 19, 1905 0. C. & 0. M. ULRICH & B. F.SCHUBERT. AUTOMATIC SMOKE CONSUMING DEVICE..

APPLICATION FILED MAR. 27, 1905.

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No. 800,034. Y PATENTED SEPT. I9, 1905.

0. C. & 0. M. ULRICH & B. SCHUBERT. AUTOMATIC SMOKE CONSUMING DEVICE.

APPLICATION FILED MAILZ?, 1905.

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No. 800.034. PATENTED SEPT. I9, 1905. C. C. C o. M. ULEICII C E. E.sCEIIEEET. AUTOMATIC SMOKE CCNSUMINC DEVICE.

APPLICATION FILED MAR. 27, 1905.

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22E/WMZ UNITED STATES PATENT CEEICE.

OSCAR C. ULRICH AND OSCAR M. ULRICH, OF KANSAS CITY, MIS- SOURI, ANDBERNARD F. SCHUBERT, OF WASHINGTON, DISTRICT or CoLUMRiA.

AUTOMATIC SMOKE-CONSUNIING DEVICE.

Specicaton of Letters Patent.

Patented Sept. 19, 1905.

Application filed March 27, 1905. Serial No. 252,291.

. Improvements in Automatic Smoke-Consuming Devices; and we do declarethe following to be a full, clear, and exact description of theinvention, sucli as will enable others skilled in the art to which itappertains to make and use the same.

Our invention relates to improvements in ,smoke-consuming devices forsteam-boilerand other furnaces, and more particularly to that class ofsuch devices in which combustible matter in the smoke, gases, and otherproducts of combustion is consumed by being burned in an auxiliarycombustion-cliamber or firebox located beneath the boiler in rear of themain fire-box or combustion-chamber.

One object of the invention is to provide a simple and efcient device ofthis character by means of which the capacity for combustion and theheating-surface of the furnace will be greatly increased, so that allthe combustible matter in smoke, gases, and products of combustion willbe entirely consumed.

Another object ofthe invention is to so construct tlie auxiliarycombustion-chamber and arrange the burners therein that all the smokeand products of combustion passing from the main combustion-chamber willbe drawn into the auxiliary combustion-chamber and cause acirculation'therein in a circular path, so that every particle ofcombustible. matter contained in the smoke and gases will be broughtinto contact with the iames of the burner and be entirely consumed.

A further object of the invention is to provide a simple and eiiicientmeans for simultaneously throwing the smoke-consuming device into andout of operation and turning the damper in the escape-'stack on and off.

WV ith the above and other objects in view the invention consists ofcertain novel features of construction, combination, and arrangement ofparts, as will be more fully described, and particularly pointed out inthe appended claims.

In the accompanying drawings, Figure 1 is a side elevation of asmoke-consuming furor main combustion-chamber 10.

nace constructed in4 accordance with our invention. Fig. 2 1s a verticallongitudinal sectional view through the same. Fig. 3 1s a verticaltransverse sectional view taken on the line 3 3 in Fig. 2. Fig. 4 is ahorizontal sectional view taken on the line i 4 in Fig. 2, and Fig. 5 isa detail horizontal sectional View taken on the line 5 5 in Fig. 3.

In the accompanying drawings we have illustrated our invention asapplied to a steamboiler furnace 1 of Well-known form, which comprisesacylindrical boiler-shell 2, mounted horizontallyin a brick casing 3.The boilershell 2 has extending therethrough the usual iiue-tubes 4,which have their forward ends opening into a chamber 5, to which isconnected an escape stack or passage 6, a damper 7 of well-known formbeing provided in the latter. In the casing 3 beneath the forward partof the boiler is the usual {ire-grate 8, which separates the ash-pit 9from the main fire-box or combustion chamber 10. The usualtransversely-extending Ere-wall 11 is provided at the rear of the grate8 and has a concave or semicircular upper edge or top 12, as shown.

In rear of the fire-box 10 and beneath the rear portion of theboiler-shell 2 is constructed an auxiliary combustion-chamber 15 ofcircular or frusto-conical form. This chamber is constructed byarranging the bricks 16 of its successive tiers or layers radially, asclearly shown in Fig. 5 of the drawings,land itis made smaller indiameter at its top than at its bottom by having the inner ends of thebricks of each successive tier or layer project slightly over or beyondthose of the next lower tier or layer,as clearly shown in Figs. 2 and 3of the drawings. These bricks 16 are only cemented or united byflre-clay17 at their innerends, the spaces 18 between their outerportions being left open, as Seen in Fig. 5, to allow for expansion andcontraction. This auxiliary combustion-chamber 15 may bc of any desiredsize and depth, and in it at suitable points are arranged one or moreburners 19, which are adapted to project their flames angularly, so asto cause a circular motion of the smoke, gases, and products ofcombustion passing into said chamber from the fire-box The burners 19may be of any desired form and construction and are only conventionallyillus- IOO trated in the drawings. As clearly shown in Fig. 5, two ofsaid burners are provided, one upon each side of the lire-box, and theyproject through vangular-ly-disposed air-inlet openings 20, formed inthe brick work or casing 3. Airis injected or drawn into the chamber 15through these openings or passages 2O by means of the rotary circulationof the gases within said chamber for the purpose of assisting the llamesof the burners in consuming the carbon and other combustible particlescontained in the smoke and gases. It will vbe understood that air isalso injected into this chamber through the burner-tubes 19, togetherwith the oil or gas which is Aburned by said burners.

In order to control the passage of the smoke, gases, and products ofcombustion as they pass over the usual fire-wall 11 and to cause thesame to circulate downwardly through the auxiliary combustion-chamber 15or to pass directly under the boiler and back through the flue-tubes 4,we provide centrally and transversely above the auxiliarycombustionchamber 15 a hollow partitionwall 21, in which is slidablymounted a controlling gate or valve 22. This partition-wall isconstruct- A ed by building two side portions 23 and 24,

between which the gate 22 slides upon a fireclay slab 25,which extendstransversely across the center of the top of the chamber 15. The frontside or portion 23 of this wall is fiat, as shown, and stops a suiicientdistance below the bottom of the boiler to permit the heated air andproducts of combustion from the fire upon the grate 8 to pass freely anddirectly under the boiler whensaid gate 22 is lowered within said wall.The gate 22 consists of a fire-clay slab 26, which has its upper endconcave or semicircular in form to permit it to snugly engage the bottomof the boiler-shell 2 when elevated, as shown in Figs. 2 and 3 of thedrawings. The sides or ends 27 of this fire-slab slide in verticalgrooves or channels 28, formed in the brick Work or casing 3. The slab26 is supported upon a casting 29 bymeans of lugs 30, provided upon saidcasting and projecting into recesses formed in the bottom of said slab.This casting 29 is secured'upon the upperend of a vertically-disposedrod 31, which projects through a central opening 32, formed in the slab25, and through a tubular post or standard 33, arranged beneath saidslab 25 and adapted to assist insupporting the same. Upon the lower endof the rod 31, which projects into a chamber 34, formed beneath thebottom of the furnace, is a flanged friction-roller 35, which is adaptedto engage one arm ofalever 36. rThis lever 36 is pivoted, as at 37, in abracket 38 and has its other arm engaged with a flanged friction-roller39, provided upon the lower reduced end 40 of a plunger 41, which servesas a counterbalancing-weight for the gate or valve 22. This plunger orpiston is cylindrical in form and adapted to slide freely within thepneumatic cylinder 42, which is secured, by means of brackets 43, upononeI of the outer sides of the furnace-casing3. The cylinder 42 isprovided at its upper end with a three-way cock 44, through whichcompressed air or other suitable motive fluid may beadmitted andexhausted for the purpose of operating the piston or plunger 41. Thevalve 42 may be of any desired form and construction and may be operatedautomatically or manually, as desired. We preferably, however, provideconnections (not illustrated) which extend to the front of the boiler,so that the engineer may operate the device from that point. Thecylinder 42 is closed at its upper end by a screw cap or head 45, and atits lower end is provided a stuiing-box 46 to prevent the escape of airaround the piston 42, which projects through the lower end of saidcylinder. It will be seen that when air, steam, or other motive iuid isadmitted through the valve 44 and into the upper end of the cylinder 42the piston 41 will be forced downwardly to elevate the gate or fire-slabto its closed position (shown in Fig. 3) and that when the air or steamis permitted to escape from the cylinder the gate or slab will lowerbetween the side portions of the partition-wall 21 by gravity.

In order to operate the damper 7 in the escape-stack at the same timethe lire-slab or gate 22 is operated, we provide upon the upper end ofthe piston 21 a rod 46', which projects through a stuiiing-box 47,formed in the head 45, and is loosely connected, as shown at 48, toonearm of a bell-crank lever 49. This lever is pivoted, as at 50, to abracket upon the top of the casing 3 and has its other` arm connected bya link 51 to a crank-arm 52, provided upon a pivot 53 of the damper 7.It will be seen that when the lire-slab or gate 22 is elevated thedamper 7 will be opened, and when the former is lowered said damper willbe closed.

1t will be seen that the partition-wall 21 divides the top of theauxiliaryV combustionchamber into'an inlet or suction opening 55 and anoutlet or discharge opening 56, which are located u'pon opposite sidesof said wall. In order to properly direct the smoke and gases into thisinlet opening or mouth 55 of the combustion-chamber, we construct therear side 57 of the wall 11 so that it inclines downwardly andrearwardly and so that it is semicircular in shape, as clearly shown inFig. 4 of the drawings. This side 57 of said wall isconstructed byarranging the bricks of the different layers of which it is composedradially, as shown, and having the bricks of Yeach successive layer ortier set slightly back upon those of the layer or tier next above. Thespaces between the outer portions of these bricks are also left open, so that the bricks may expand and contract freely. It

will be seen that as the smoke and gases pass IOO IIO

over the curved top of the wall 11 they strike l the gate 22 andpartition-wall 21 and rebound against the curved stepped "side 57 of thewallll and are directed intothe mouth orinlet 55 of thecombustion-chamber 15. After circulating in this chamber and beingbrought into contact with the ames of the burners 19, so that they willbe entirely or partially consumed, they pass upwardly through thedischarge or outlet opening 56 of said chamber into another chamber orcompartment 58, which is formed between the rear side or portion 24 ofthe partition-wall 21 and a deilector-wall 59, which is disposeddirectly beneath the .rear end of the boiler-shell 2 and in front of apit 60 in which soot and dust formed by the combustion of the smoke andgases may be collected, so as to permit them to be readily removed. Inthis chamber 58 we preferably provide two or more auxiliary burners 61,which are similar to the burners 19 and which are arranged at oppositepoints in the sides of the casing 3. These burners project throughair-inlet openings 62, formed in said casingv and in the lower portionsof vertically-disposed tire-slabs 68, which are arranged at oppositepoints in the sides of said casing. These burners 61 direct their(llames toward each other and into the gases and products of combustiondischarged through the opening' 56, so that any combustible particles ofmatter which may escape being consumed in the chamber 15 will beconsumed in the chamber 58. In order to retard or check the passage ofthe heated air and products of combustion through the chamber 58, thefront side Aof the deflector-wall 59 is provided with pockets 64, whichare formed by having every other layer or tier 65 of bricks, of whichthe said wall is made, overhang those between them, as clearly shown inFig. 2 of the drawings. The forward side or face of the deflector-wall59 is curved, asA shown in Fig. 4. 4Heat-containing pockets 66 are alsoprovided at the ends of the portion 24 of the partition-wall 21 for thepurpose of checking or retarding the passage of the heated air andproducts of combustion through the chamber 58. These pockets 66 areformed by placing the end bricks of each alternate tier or layer of the.wall 24 angularly, as shown in Fig. 4 of the drawings.

The operation of the invention is as follows:

When a fire is started upon the grate 8 or a fresh supply of fuel isplaced thereon, so that heavy smoke and gases pass over the wall 11, thegate 22 is elevated and the damper 7 opened by operating the valve 44 ofthe pneumatic operating device. The smoke and gases then pass downwardlyin front of the partition-wall 21 and into the auxiliarycombustion-chamber 15, whe-re the combustible vmatter which they containis brought into contact with the iiames of the burners 19 by reason ofthe circulation in said chamber.'` Should any com-- bustible particlesfail to be consumed by the Hannes from the burners 19, they will beconsumed by the flames from the burners 61 as they pass out of thechamber 15 and into the chamber 58. From the chamber 58 the heated airand products of combustion pass around the end of the boiler through theflue-tubes 4 and out through the escape-stack 6. After the fuel upon thegrate 8 has burned, so that there is little or no smoke passing over thewall 11, the gate 22 may be lowered, thereby permitting the heat fromthe fire to pass directly under the boiler and over the top of the wall21.

While we have shown and described the preferred embodiment of ourinvention, it will be understood that the same may be applied tofurnaces of'any description and that various changes inthe forni,proportion, and the minor details of construction may be resorted towithout departing from the principle or sacrificing any of theadvantages of this invention.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

I 1. A furnace having a main combustionchamber, a passage leadingtherefrom, an auxiliary combustion-chamber under and connmunicating withsaid passage, means to create a circular draft in the auxiliarycombustionchamber, and means to open and close said passage to cause thedraft from the main combustion-chamber to pass either through thepassage or the said auxiliary combustionchamber, at will.

2. The combination of a furnace having a main combustion-chamber, anauxiliary com-A bustion-chamber and a boiler disposed above saidchamber, a partition-wall arranged across the open upper end of saidauxiliary com bustion-chamber and forming an inlet or suction openingand a discharge-opening for said auxiliary combustion-chamber, agas-consuming means in said auxiliary combustion-chamber, saidpartition-wall having its top spaced from the bottom of said boiler, anda movable gate in said partition-wall for controlling the passage ofgases above and through said auxiliary combustion-chamber.

8. The combination of a furnace having a main combustion-chamber, anauxiliary combustion-chamber and a boiler disposed above said chamber, apartition-wall arranged across the open upper .end of said auxiliarycombustion-chamber and forming an inlet or suction opening and adischarge-opening for said auxiliary combustion-chamber, a gas-consumingmeans in said auxiliary' combustion-chamber, said partition-wall havingits top spaced from the bottom of said boiler, a sliding gate in saidpartition-wall for controlling the passage of gases above and throughsaid auxiliary combustion-chamber and means for raising and loweringsaid gate.,

4. The combination'of a furnace having a IOO IIO

main combustion-chamber, an auxiliary combustion-chamber and a boilerdisposed above said chamber, a partition-wall arranged across the openupper end of said auxiliary combustion-chamber and forming an inlet orsuction opening and a discharge-opening for said auxiliarycombustion-chamber, a gas-consuming means in said auxiliarycombustion-chamber, said partition-wall having its top spaced from thebottom of said boiler, a sliding gate in said partition-wall forcontrolling the passage of gases above and through said auxiliarycombustion-chamber, an escape stack or passage for said furnace, adamper in said stack or passage and means for simultaneously operatingsaid gate and said damper.

5. rlhe combination of a boiler, a main combustion-chamber locatedbeneath the front of the same, an auxiliary combustion-chamber in theform of a circular pit located beneath the rear of said boiler andhaving overhang-I ing walls, an angularly-disposed burner arranged insaid pit, a hollow partition-wall arranged transversely over the opentop of said pit, a vertically-sliding gate in said partitionwall adaptedto open and close the space between the top of the latter and the bottomof said boiler, a deflector-wall arranged beneath the rear. of saidboiler in rear of said partitionwall, and a burner arranged between saiddeiiector-wall and said partition-wall, substantially as described.

6. The combination of a boiler, a main combustion-chamber locatedbeneath the front of the same, an auxiliary combustion-chamber in theform of a circular pit located beneath the rear of said boiler andhaving overhanging walls, a fire-wall arranged between said chambers andhaving arearwardly and downwardly inclined rear face, anangularly-disposed burner arranged in said pit, a hollow partition-wallarranged transversely over the open top of said pit, avertically-slidable gate in said partition-wall adapted to open` andclose the space between said partition-wall and said boiler, means forraising and lowering said gate, a deflector-wall arranged. beneath therear of said boiler in rear of said partition-wall, fire-slabs arrangedbetween said deflector and partition walls and oppositely-disposedburners projecting through said slabs, said deflector-wall having itsfront face formed with heat-retaining pockets.

7. The combination of a boiler, a main combustion-chamber, an auxiliarycombustionchamber in the form of a substantially semicircular pit orwell, a lire-wall disposed between said chambers and having its rearface curved longitudinally and inclined downwardly and rearwardly to thetop of said pit, a partition-wall disposed across the top of said pit, amovable gate mounted in said partitionwall and adapted to open and closethe space between the latter and said boiler, an angularly-disposedburner in said pit, a detlectorwall disposed adjacent to the dischargeof said pit and having one of its faces curved longitudinally and formedwith heatretaining pockets, and a burner arranged between said deflectorand partition walls and adjacent to the discharge of said pit,substantially as described.

8. The combination with a furnace having an auxiliary combustion-chamberarranged beneath its boiler, a partition-wall arranged across the opentop of said chamber, a gate slidably mounted in said partition-wall, arod secured to said gate and extending downwardly through said wall andsaid auxiliary combustion-chamber, a friction-roller upon said rod, alever having one end engaged with said roller, a cylinder, a piston insaid cylinder, a friction-roller carried by oneend of said piston andadapted to engage the other end of said lever and a valve forcontrolling the admission and exhaust of a motive fluid to and from saidcylinder.

9. The combination with a furnace having an auxiliary combustion-chamberarranged beneath its boiler, a partition-wall arranged across the opentop of said chamber, a gate slidably mounted in said partition-wall andconsisting of a fire-clay slab and a casting secured thereto, a rodsecured to said casting and extending downwardly through said wall andsaid auxiliary combustion chamber, a friction-roller upon said rod, alever having one of its ends engaged with said roller, a cylinder havingstufing-boxes at its ends, acounterbalancing piston slidably mounted insaid cylinder and having its lower end projecting through the same, afriction-roller carried by the lower end of said piston and engaged withthe other end of said lever, a valve for controlling the admission andexhaust of a motive fluid to and from said cylinder, a bellcrank havingone of its arms loosely connected to the upper end of said piston, anescapestack for said furnace, aidamper in said stack and a linkconnecting said damper andthe other arm of said bell-crank.

10. A furnace having a main combustionchamber, a passage leadingtherefrom, an auxiliary combustionchamber communicating with saidpassage, a gate to open and close said passage to cause the draft topass either through the passage or the said auxiliarycomkbustion-chamber, a damper in the flue, and

operating means connecting the gate and damper to simultaneouslyreversely operate them, so that one opens when the other closes.

In testimony whereof we have hereunto set our hands in presence of twosubscribing Wit- DGSSCS.

OSCAR C. ULRICH. OSCAR M. ULRICH. BERNARD F. SCHUBERT. Witnesses:

JOHN L. FLETCHER,v JAMES F. Cox.

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